https://github.com/hzeller/bumps
BeagleBone Universal Multi Pololu Steppers
https://github.com/hzeller/bumps
Last synced: 8 months ago
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BeagleBone Universal Multi Pololu Steppers
- Host: GitHub
- URL: https://github.com/hzeller/bumps
- Owner: hzeller
- Created: 2014-02-02T02:34:47.000Z (over 11 years ago)
- Default Branch: master
- Last Pushed: 2016-01-25T04:39:15.000Z (over 9 years ago)
- Last Synced: 2024-12-29T09:43:27.976Z (10 months ago)
- Language: KiCad
- Size: 5.18 MB
- Stars: 22
- Watchers: 8
- Forks: 10
- Open Issues: 7
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
Bumps
=====
> BeagleBone Universal Multi Pololu Steppers
BeagleBone Black cape for [BeagleG][beagleg-url]; using 5 stepper driver modules
from Pololu.
Bumps is an board to work together with [BeagleG][beagleg-url], a fast
GCode system for CNC/3D printers and one of the first making use of the PRU
of the Beaglebone Black for extremely fast step generation.
Find the current version from June 2015 [shared on OshPark][osh-bumps1]. Or use
the [Gerber files](./gerbers/bumps-gerbers.zip) directly.
### Version History
* Version 0.1 March 2014 ; 5 Stepper drivers, 2 Power PWMs, 2 small PWM, 2 aux outputs.
* Version 0.2 June 2015; small revision of otherwise great first board (fix a missing pullup and wrong solder-mask at one place).
### Current work
Work in progress on 0.3 hardware update.
Version 0.3 is work in progress with some changed FETs and other little changes
(see illustration below) but also there is a bigger change
(in branch drv8825-direct) work in progress to directly use the drv8825
drivers without Pololu modules.
Features
* Simple, mostly passive board with cheap components.
* Single supply; no separate 5V needed:
* 5V switching supply to power the BeagleBone from motor voltage (12-36V).
* Local 3.3V power supply to not put any strain on BBB 3.3V
* 5 slots for [Pololu-compatible][pololu-url] stepper driver boards.
* 1 Emergency switch input, directly wired to hardware-reset stepper drivers.
* 2 high power PWM (Motor voltage, ~20A)
* 2 Open Collector PWM for smaller loads (Up to 20V, ~2A)
* 2 Open Collector Auxilliary Outputs (Up to 20V, ~2A)
* 3 endswitch inputs.
* 3 temperature sensor inputs.
The following illustrations represent the current work in progress:
![Schematic][schem]
![Board][board]
In real life, the March 2014 version (essentially identical to the June 2015
version):
![Assembled][assembled]
* Board fabbed by http://oshpark.com/
* Solder paste dispensed with http://github.com/jerkey 's 3D printer, using
a program to translate a KiCAD file to GCode (https://github.com/hzeller/rpt2paste )
.. the whole thing made it to Hackaday:
http://hackaday.com/2014/04/02/dispensing-solder-paste-with-a-3d-printer/
* Assembled using a self-made vacuum tweezer
https://plus.google.com/u/0/+HennerZeller/posts/b3NbB7NzQcM
* Early test of the system http://youtu.be/hIEY9077D64
[beagleg-url]: https://github.com/hzeller/beagleg
[pololu-url]: http://www.pololu.com/product/1182
[schem]: https://github.com/hzeller/bumps/raw/master/img/bumps-schem.png
[board]: https://github.com/hzeller/bumps/raw/master/img/bumps-board.png
[assembled]: https://github.com/hzeller/bumps/raw/master/img/bumps-connect.jpg
[osh-bumps1]: https://oshpark.com/shared_projects/zIXfRqDE